but according to the NIH, 30.7% of Americans are overweight, and 42.4% are obese. as the median American is overweight, it doesn't seem a stretch to claim that the median American is also pre-diabetic? I don't know whether it's true or not, but your evidence seems a bit thin.
https://www.cdc.gov/diabetes/data/statistics-report/index.ht...
No, it's your evidence that's thin. You seem to have started from the premise ("Americans are unhealthy") and derived a pre-diabetes level from that.
The prediabetes level is drawn from where you see a huge uptick in the risks for developing diabetes mellitus.
You want data? There is plenty of it out there. If you're gonna try to dispute the established understanding, you need to bring evidence or you are just wasting people's time.